Furnace construction



y 1932. R. D FOLTZ l,858...489

FURNAGE CONSTRUCTON ort. This Space is lled With a C0Inpressiblerefractory Inaterial 20 Such as a Inixture of fire clay and asbest0s, t0C10Se the j0int be Ween the Sections. The verticl faces 0f the)rojecting )Ortions 17 and 18 are in abutment, S0 that they als0 Closethe j0int While at the Same time a110wing upward movement 0f therefractories 18 incident t0 therInal eX- Pansion -vithout subjecting therefract0ries 17 0I' the brick supports 12 t0 3' resulting ressure. Therefrac...tories in the respective courses are Placed in` latera1abutlnent, S0 that L Continuous refractory c10sure is forn1ed, exceptingvvllere desired 0Penings 1Ilay be provided lle anchoring 1I1en1bers 19Ina... be susceptible 0f Sliding movenent 10I1git11di11a1ly of the vvallbut are Inaintailled in their desired vertical 0Sition and are heldagainst Shifting invvardly OI' 0ut-vardly lhe refract0ries Inay take any0f vari0us f0rIns, certain variti0ns being shovvn in the drawings by wayof examp1e If it is desired t0 )artly cover 0I shield L )Ortion 0f theareaa 0f the vl1 tubes, the refractories nlay be 0f sllch length as t0extend betvveen the l1beS, their inner C0I'Iler )ortions being COIl caveS0 as t0 Conforln t0 the contour of the tubes and PerInit the lattel' t00ccupy a Portion Partly i11-set int0 the refrac#0ry vvall, asilll1strated in igS' 2 3Ild 3 and in the 11I)Per portion of Fig. 1. 0Ithe refractories may be 0f such length as to terminate in aa planeadjacent the tubes, as i11l1strated in the POI' tion of Fig 1 bracketedat N. ()r vvhere the center Spacing of the tubes exceeds the vvi(1th ofthe refrct0rieS, refract0ries having 0Ile corner portion concave Inay beused, s illustrate(1 in the lower ortion 0f ig. 1. The spacing 0f thetubes and the extent t0 Which it Iny be desirable to inset tllenl int0the refract0ry Wall wm depend on the amount of heat tranferenCe desiredfronl the furllape chanlber int0 the vteI' in the tubes and thetenlperature vvhich it is desired to 1IlaintliIlin the fllrIlacechanlber. It iS desirable, hovvever, that the vvidth of the refrCtOrieScorres ond t0 the Spacing of the tubes S0 that the vertical j0ints Ofthe wall will be behind the tubes, and thus shielded thereby.

It Tvill be )I)I'eciated that the tubes exercise a c00ling andShielding, a'lld hence tem- PertureliIniting eifect on the azdjacent refractories IIence the refract0ry vvall Iny be heat insulated externally,Ild this Inay be done by covering theIn externally vith lag gingInaterial 21. ...Il 8ppr0priate external sheathjng may be formed oflates 22 Which re flanged at their I]lrgins and have tle lateral Hangesbolted to the Hanges ll and the horizontal f13nges bolted t0 thenleeting fianges ()f Superjacent nd SubjCent plt( Sections. In ig' 6 isshovvn a part vvall e]evation Tvith 0Ile of the p18te sections ren10ved.S there i1111strate(1, it iS desirable that the h0riz0ntl j0ints of thesheathing sgctions Coincide appr0xi1nately vith horiz0ntal j0ints0fthesecti0na1vva11. ly relnoval of a sheathing late and the lagging1Tlaterial -vhich it C0vers, access II18y be hd to aIly vval1 Secti011fr0In the 0lltside Of the furn0e, f()I' replacenlent Of vvallrefractories or CCeSS t0 the tubes. 1efraCt0ieS are eSily I(TI10ved andreplaced in any Section by removing S0 many aS my be necessary 0f tlleuppermost course 0f ref1'actories 18 directly outvvardly. lhis Pernlitsthe subjacent refract0Ties t0 be lifted fr0m the anchoring melnbers 19and I'eTr10ved 011tvardly, and the refractories Inay be replaced in thevvall Structure as readily, Such removals Ild replaceInent being Inadeinthe selected Section vithout inv0lving re T10val of refractories fr0many 0ther section.

It vvill be observed that by virtue 0f the construction described, thevvall refract0ries are defllitely nchOred against invvard dis`Placernent Such aS vvou1d subject the tubes t0 thrusts, the refractoriesbeing S0 maintained by virtue 0f the independent support of the vvallsections, the anchorage Of the refractories 16 and 17 by the members 19and of fhe refractories 18 'by their abutment vvith the refractories 17-Additiona1 anc110rage of refraCt0 ieS 18 Inay be provided by nCh0ringirohs '24L as described in Iny T S. Ietters 1 atent TO. 1,747,82 forfurnce Tvall con- Struction, certai11 0f the lefractories 18 in eachcourse being free of such anchoring ir011s, however, t0 PerInit thirvvithdraTva1 directly outvardly. 1Tot only are the vvall refractoriesthus easily replaceable, but like vvise the anch0ring meInbers 19 andbrick supports 12 ny of Which may be removed and replced entirely by0Perations fronl the 0utside 0f the furnace.

In 1 ig. 7 iS illustrated a n10dified construction vvherein bar members12' are bolted t0 the flanges of the members 10 and the webs of thechannels 11 and Inay extend continu ously across a nuInber 0f thecolumns. Ille anchoring 1Tlen1bers 19' are cSt il'()Ii Inembers iiketh0se reviously described, Tvith the exception tllat each iSadditiona]ly forIne(1 vvith a bottoln shelf Portion 12 vvhich extends t0a distance beyond the Inargins and innel' face 0f the flanges 19 andC0T1Stitutes a brick support. l`hese anchoring melnbers are connected t0the Supportin;... Ie!nbers 12 by nleans qf the parts 19 and 19 as abovedescribed, S0 that they are Supported in an npright osition vith thehelf portions 12 in generlly horizontal p0sition. vvall Sections arethen built up as ab0ve described the refrct0rieS of the l0vermOSt(F()llrse 0f each Section being Supported on the shelf ortions 12 Itvill be 0bserved that by virtue 0f the c0nstructions ab0ve described, acontinuous Tefractory vvall Inay be r0vided in ass0ciation vvit 1`vva11tubes, the refrct0ries and the tubes being nlaintained il a!1as30ciati0n bers extend ve rtically and hve ainchoril1 engagement eachwith a pluralit of re 8(: tories said anchori11 members eing s ced fromsuperjacent br1ck supports t0 Permit withdrawal of all of therefractories out- Wardly from res ective wal1sections fter removal ofthe i11sulating Inaterial.

In testimon Scribed m na y where0f hve hereunt0 subme.

